The Belgic Confession, XXVIII
We believe that since this holy assembly and congregation is the gathering of those who are saved and there is no salvation apart from it, no one ought to withdraw from it, content to be by himself, regardless of his status or condition. But all people are obliged to join and unite with it, keeping the unity of the church by submitting to its instruction and discipline, by bending their necks under the yoke of Jesus Christ, and by serving to build up one another, according to the gifts God has given them as members of each other in the same body. And to preserve this unity more effectively, it is the duty of all believers, according to God’s Word, to separate themselves from those who do not belong to the church, in order to join this assembly wherever God has established it, even if civil authorities and royal decrees forbid and death and physical punishment result. And so, all who withdraw from the church or do not join it act contrary to God’s ordinance.
Articles of the Church of England, XX
The Church hath power to decree Rites or Ceremonies, and authority in Controversies of Faith: and yet it is not lawful for the Church to ordain any thing that is contrary to God’s Word written, neither may it so expound one place of Scripture, that it be repugnant to another. Wherefore, although the Church be a witness and a keeper of Holy Writ, yet, as it ought not to decree any thing against the same, so besides the same ought it not to enforce any thing to be believed for necessity of Salvation.
Westminster Confession of Faith XXXI, III
It belongs to synods and councils, ministerially to determine controversies of faith, and cases of conscience; to set down rules and directions for the better ordering of the public worship of God, and government of his Church; to receive complaints in cases of maladministration, and authoritatively to determine the same; which decrees and determinations, if consonant to the Word of God, are to be received with reverence and submission; not only for their agreement with the Word, but also for the power whereby they are made, as being an ordinance of God appointed thereunto in His Word.
The Savoy Declaration XXVI, III
The purest churches under heaven are subject both to mixture and error, and some have so degenerated as to become no churches of Christ, but synagogues of Satan: nevertheless Christ always hath had, and ever shall have, a visible kingdom in this world, to the end thereof, of such as believe in him, and make profession of his name.
London Baptist Confession of Faith XXVI, XII
As all believers are bound to join themselves to particular churches, when and where they have opportunity so to do; so all that are admitted unto the privileges of a church, are also under the censures and government thereof, according to the rule of Christ.
The Augsburg Confession XXVIII
But this is their opinion, that the power of the Keys, or the power of the bishops, according to the Gospel, is a power or commandment of God, to preach the Gospel, to remit and retain sins, and to administer Sacraments. For with this commandment Christ sends forth His Apostles, John 20:21, As My Father hath sent Me, even so send I you. Receive ye the Holy Ghost. Whosesoever sins ye remit, they are remitted unto them; and whosesoever sins ye retain, they are retained. Mark 16:15, Go preach the Gospel to every creature.This power is exercised only by teaching or preaching the Gospel and administering the Sacraments, according to their calling either to many or to individuals. For thereby are granted, not bodily, but eternal things, as eternal righteousness, the Holy Ghost, eternal life. These things cannot come but by the ministry of the Word and the Sacraments, as Paul says, Rom. 1:16, The Gospel is the power of God unto salvation to every one that believeth.